Tournament organisers later said they had agreed with the government to have 7,477 fans in each of Thursday’s two sessions and the same number for the singles finals sessions on Saturday and Sunday evenings.
Fans must wear masks where “social distancing is not possible”, they added.
“We look forward to welcoming fans back to the Australian Open for the next four days and to finishing the event safely and on a high,” tournament director Craig Tiley said in a statement.
“The crowd will be capped at 7,477 for each session, which is approximately 50% capacity. Last week we had our first real experience of live sport with fans in the stands and the atmosphere was electric.”
Tiley’s reference to 50% capacity related to the showcase Rod Laver Arena, which can seat some 15,000 people, but he said fans would be allowed into the various entertainment areas around the precinct.